外场作用对PBS及嵌段共聚物PBS-b-PEG结晶形态的影响  

Effect on Crystal Morphology of PBS and PBS-b-PEG under Outer Field

作　　者：周晓明[1] 李颖[1] 王华山[1] 揣成智[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300457

出　　处：《塑料工业》2012年第4期75-77,105,共4页China Plastics Industry

基　　金：国家十一五科技支撑计划项目(编号:2009BAK61B04)

摘　　要：采用偏光显微镜对聚丁二酸丁二醇酯(PBS)及聚酯嵌段共聚物聚丁二酸丁二醇酯-b-聚乙二醇(PBS-b-PEG)在不同外场环境下的结晶形态进行研究。结果表明:在等温结晶过程中,PBS及PBS-b-PEG的球晶尺寸及形貌同结晶温度和时间密切相关,PBS在90℃等温结晶2 h后可形成明显的环带球晶形态;PBS及PBS-b-PEG在水环境下等温结晶,水起到成核剂的作用,使球晶尺寸细化,球晶形貌发生改变;超声振动作用具有使PBS球晶尺寸细化作用,而对PBS-b-PEG结晶影响较小。Using polarized light microscopy, outer field factors affect crystallization of poly （butylene succinate） （PBS） and polyester block copolymer （PBS-b-PEG） were studied. The results showed that： during the isothermal crystallization section, the crystal size and morphology were related with the crystal tem- perature and time. The ring-banded spherulites of PBS can be formed while crystallized at 90 ℃ for 2 h. The isothermal crystallization of PBS and PBS-b-PEG were done in water, following that the crystal size would change into small, and the crystal morphology would also vary. Water acted as a nucleating agent during crystal process. In addition, the use of ultrasonic vibrations caused the more small crystal size for PBS than for PBS-b-PEG during the isothermal crystallization process.

关 键 词：外场环境 超声振动 环带球晶 聚丁二酸丁二醇酯 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]